August loeffler



(N M d l.)

o 0 e LOEFFLER BEST AVAILABLE COP INSTANTANEOUS SHUTTER FORPHOTOGRAYPHIG LENSES.

No. 313,677. Patented Mar. 10, 1885.

WITNESSES i 6% ATTORNEYS.

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AUGUST LOEFFLER, OF TOMPKINSVILLE, NEW YORK.

INSTANTANEO US SHUTTER FOR PHOTOGRAPHIC LENSES.

SPECIFICATION forming part. of Letters Patent No. 313,677, dated March10, 1885.

Application filed December .2, l884. (No model Id the drawings thelens-tube B is repre- To all whom it may concern:

Be it known that 1, AUGUST LOEFFLER, of Tompkinsville, in the county ofRichmond and State of New York, have invented a new and usefulImprovement in Instan'taneous Shutters for Photograph-Lenses, of whichthe following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is a front elevation of one of my improved shutters, part beingbroken away. Fig. 2 is a sectional side elevation of the same, takenthrough the line a: a, Fig. 1. Fig. 3-is a sectional plan view of thesame, taken through the line y 1, Fig. 1. Fig. 4 is a side elevation ofthe upper and'middle part of the same.

The object of this invention is to promote convenience in instantaneousphotographing, and provide a mechanism simple in construction andreliable in operation "for instantly uncovering and covering the lenses,so as to obtain an instantaneous exposure.

The invention relates to an instantaneous shutter for'photograph-lenses,constructed with a plate, having opening to receive the lenstube, aspring-roller, and a plain roller con nected with the said plate andprovided with a connecting-cloth having central opening, and a handle,ratchet-wheel, and spring-lever pawl, whereby the said rollers can bereadily turned and released. The handle is provided 5 with a pin toengage with a latch pivoted to the plate, and limited in its movement bya stoppin, whereby the said handle will be antomatically caught and heldagainst the draft of the spring-roller. The apertured plate is providedwith keepers to receive the edge of a plate, having a larger or smalleropening than the main plate and kept in place by a sented as beingsmaller than the aperture in the plate 0. In this case a board or plate,D

having an aperture of the proper size to re-- 1 .to different sizes oflens-tubes.

To the side edges of the plate 0 are attached bars G, the ends of whichproject at the upper and lower corners of the said plate, and areperforated to receive the journals of the rollers H I. The lower roller,H, is a springroller,and the upper roller, I, is a plain roller.

J is a strip of black cloth or other suitable flexible material, of awidth a little less than the breadth of the plate 0 and of a length.

about equal to three times the length of the said plate 0. The ends ofthe flexible material J are wound upon and attached to the rollers H I,and in the center of the said strip is formed a square aperture, alittle less in size thanthe plate 0.

To the forward side of the side edges of the plate 0 are attached barsor plates K, the under sides of the inner edges of which are rabbeted toreceive the side edges of the flexible material, so that the said platesK will serve as guides to keep the said flexible material close to theplate 0 as it is being wound from one to the other of the rollers H I.

To one of the journals of the upper or plain roller, I, is attached acrank, L, or other-suitable handle for turning the roller I to wind theflexible material J upon it, the unwinding of the said material from thespring-roller II coiling up the spring of the said roller H and puttingit under tension.

To the inner side of the handle L is attached a pin, M, which, as thesaid handle revolves, strikes, raises, and passes a catch, N, pivoted tothe edge bar G, so as to hold the said haning in the plate 0, asillustrated in Figs. 1 and Y 2. The lens is thenfocused. The roller I isturned to wind up another third of the cloth '"J and bring the lowerpart of the said cloth over the opening in the plate 0. v The sensitiveplate is then. inserted, and at the proper time the pawl P is operatedto raise its engaging end away from the ratchet-wheel Q,

1- in the cloth J is passing the opening in the plateG.

into which it may be turned. The catch N is p I] is slotted, and in thespace thus formed is placed a lever-pawl, P, the forward end of s whichengages with a ratchet-wheel, Q, rig- .idly attached tot-he journal ofthe upper roller, I. The outer end of the lever-pawl P is held up,holding its engaging end in .gear with the said ratchet-wheel Q by aspiral or other spring, R, interposed between and seis placed upon thelens-tube B, and the upper 'roller, I, is turned by turning'the handle Luntil about a third of the cloth J is wound cloth J to pass the openingin the plate 0 can less tension to the spring of the roller H.

Best AVAILABLE cop" dle from turning back, should it be aecident- 1. Inan instantaneous shutter for photo ally released, and to hold it in anyposition kept from dropping down too low by a stoppin, 0, attached tothe said bar. The handle cured to said handle and paw].

In using the improvement the plate 0 or D upon the saidupper roller, I,bringing the opening in the said cloth opposite the openwhen thespring-roller H at once winds the cloth J upon the said spring-roller Hand the sensitive plate is exposed while the opening The time requiredfor the opening in the be lengthened or shortened by giving more or 7Having thus fully described-my invention,I claim as new and desire tosecure by Letters Patentgraph-lenses, the combination, with the plate 0,having opening to receive the lens-tube, Of the springroller H, theplain roller I, and the flexible material J, attached to the saidrollers, and a mechanism for revolving and releasing the rollers,substantially as herein shown and described.

2. In an instantaneous shutter for photograph-lenses, the combination,with the plate 0, having aperture, the spring ller H, the plain rollerI, and the (310th :ig central aperture, of the handle L, "let-wheel Q,and. the spring lever-pm P R, substantially as herein shown anddescribed,whereby the said rollers can be readily turned and released,as set forth.

3. In an instantaneous shutter for photograph-lenses, the combination,with the plate 0, having aperture, the spring-roller H, the plainrollerI, the cloth J,having opening,and the handle, ratchet-wheel, andspring leverpawl L Q, PR, of the pin M, the pivoted latch N, and thestop-pin O, substantially as herein shown and described, whereby thesaid handle will be automatically caught and held against the draft ofthe springroller, as set forth.

4. In an instantaneous shutter for photographiclenses, theco1nbination,with the plate .0, having aperture, and provided withkeepers- E, of the plate 1), having aperture, and the clamping-screw F,substantially as herein shown and described, whereby the shutter can bereadily applied to lenstubes of different sizes, as set forth.

AUGUST LOEFFLER.

\Vitnesses:

J AMES T. GRAHAM, C. SEDGWICK.

